Android JNI¶

This analyzer improves support for JNI functions in Android native libraries. It works by providing a BinaryNinja type library android-jni.bntl which is placed next to the plugin’s shared library:

.
├── lief-analysis-plugin-linux-x86_64.so
├── lief-dwarf-plugin-linux-x86_64.so
└── typelib
    └── aarch64
        └── android-jni.bntl

This type library should be installed in one of the following locations:

• Linux: ~/.binaryninja/typelib/aarch64/android-jni.bntl

• Windows: C:\Users\romain\AppData\Roaming\Binary Ninja\typelib\aarch64\android-jni.bntl

• macOS: ~/Library/Application Support/Binary Ninja/typelib/aarch64/android-jni.bntl

After installation, select Plugins > LIEF > Enhance Analysis, the plugin will then import all types related to Android JNI.

In addition, it will automatically define the type for the JNI_OnLoad function:

Functions that are tagged [1] with "LIEF - Android JNI Function" are also updated to expose the correct type in the first two arguments: